Run etc/book.py; remove a wrong '\' in Exercises.v

You want *.aux, not \*.aux.
Do exercises 3.13 and 3.14
Make isequiv_homotopic show up in [SearchAbout IsEquiv pointwise_paths]
Merge pull request #318 from JasonGross/isequiv-homotopic

Make isequiv_homotopic show up in [SearchAbout IsEquiv pointwise_paths]
Merge pull request #316 from JasonGross/ex-3-13-3-14

I am assuming a single pair of eyes is ok for this.